Low pitch horn sound, what is going on.

AngelFarelli · 01-30-2020, 02:11 AM

I posted this video before which was hard to capture because this rarely happens but when it does make the sound, it is louder at low speed usually in traffic or at a light. Sound goes away as soon as I tap on the brake. Sound sorta changes when I turn my steering wheel. Sounds like my car is passing gas.

I eventually put the camera out the window to capture the sound better.

upsidedownfunnel · 01-30-2020, 03:12 AM

Dude, did you check your brakes? Sounds like something rubbing at the same speed as your wheels. Did you recently get any brake work done? Maybe a loose brake pad or caliper or something which is why it goes away when you tap the brakes. Check to see if you still have all your brake clips and they're installed correctly. Also check to see if you're very low on any of your brake pads.

1QuikWS6 · 01-30-2020, 03:26 AM

Almost sounds as if the caliper is just barely rubbing/hitting inside of wheel

Check the inside barrels of all the wheels to see if there are any marks/gouges & calipers for grinding marks

Billfitz · 01-30-2020, 06:50 AM

Sounds more like a French Horn to me. It's probably in the brakes, since it goes away when you apply them. Since the pitch doesn't change with speed it would probably be coming from a stationary source, not one that's moving.

01-30-2020, 02:11 AM	#1
AngelFarelli Second Lieutenant 57 Rep 276 Posts Drives: BMW n52 e90 Join Date: Nov 2019 Location: California iTrader: (0)	Low pitch horn sound, what is going on. I posted this video before which was hard to capture because this rarely happens but when it does make the sound, it is louder at low speed usually in traffic or at a light. Sound goes away as soon as I tap on the brake. Sound sorta changes when I turn my steering wheel. Sounds like my car is passing gas. I eventually put the camera out the window to capture the sound better.
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01-30-2020, 03:12 AM	#2
upsidedownfunnel Colonel 1999 Rep 2,499 Posts Drives: 2014 335i Join Date: Jul 2017 Location: SoCal iTrader: (4) Garage List 2014 BMW 335i [0.00]	Dude, did you check your brakes? Sounds like something rubbing at the same speed as your wheels. Did you recently get any brake work done? Maybe a loose brake pad or caliper or something which is why it goes away when you tap the brakes. Check to see if you still have all your brake clips and they're installed correctly. Also check to see if you're very low on any of your brake pads.
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01-30-2020, 03:26 AM	#3
1QuikWS6 No 55mph 1622 Rep 8,476 Posts Drives: F32 435ix MSport Join Date: Jul 2009 Location: Blitzburgh, PA iTrader: (113) Garage List 2022 BMW M440ix Vert [0.00] 2015 BMW 435ix MSport [0.00] 2000 Pontiac Trans Am [0.00]	Almost sounds as if the caliper is just barely rubbing/hitting inside of wheel Check the inside barrels of all the wheels to see if there are any marks/gouges & calipers for grinding marks __________________ F32 435ix//MGM//M Sport-Prem-Tech-Driver Assist-Lighting-Cold Weather-Dyn Handling Pkgs//M4 Black Lthr Int w/M4 Alum Blade Trim//HK w/Bavsound Stg3//763M//M4 Euro LCI Tails//M4 Mirrors w/CF Covers//AWCarbon CF F/R Spoilers-Side Splitters-Diffuser 6WB/ID6 HU+HUD/IND M4 Alcantara Armrest//PURE S2 Turbo//AA FMIC+DP//ER CP+TIC//3.5bar TMAP/TS DV//AWE Tuning Exh w/Blk Tips//Turner MS CF Intake//BM3 Cary Jordan Tune//MPerf Diff//PrecRW Ignition Kit
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01-30-2020, 06:50 AM	#4
Billfitz Lieutenant General 8245 Rep 16,088 Posts Drives: '15 328iX GT Join Date: Jan 2015 Location: New Hampshire iTrader: (0)	Sounds more like a French Horn to me. It's probably in the brakes, since it goes away when you apply them. Since the pitch doesn't change with speed it would probably be coming from a stationary source, not one that's moving.
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